Census records of free Black heads of household in the antebellum South
| Name | State | Num In Family | Notes |
|---|---|---|---|
| Mary (free) | South Carolina | — | — |
| Mary (free) | New York | — | — |
| Mary, Free | Maryland | 2 | — |
| Mason, Capt. John | Virginia | — | — |
| Mason, John, Jr. | Virginia | — | — |
| Mason, Joseph | Maryland | 6 | — |
| Mason, London | Rhode Island | — | — |
| Mason, Prince | Massachusetts | — | — |
| Massey, Ame | Maryland | 2 | — |
| Massie, Peter | Virginia | — | — |
| Matheus, Nicholas | Maryland | 9 | — |
| Mathew (free) | South Carolina | — | — |
| Mathew (free) | South Carolina | — | — |
| Mathews, Peter (free) | South Carolina | — | — |
| Matson, John | Pennsylvania | — | — |
| Matthers, Abram (free) | New York | — | — |
| Matthew, Edward | Pennsylvania | — | — |
| Matthew, Ford | North Carolina | — | — |
| Mawkins, Thomas | New York | — | — |
| Mawney, Cato | Rhode Island | — | — |
| Maxwell, James | Maryland | 1 | — |
| May, James | New York | — | — |
| May, Thomas | New York | — | — |
| Mayhall, John (Mulatto) | Maryland | 1 | — |
| Mayhall, Robert (Mulatto) | Maryland | 9 | — |